Lock for door traps and the like



NOV. 6, 1934. s SCHNEIDER ET L 1,979,497

' LOCK FOR DOOR TRAPS AND THE LIKE Filed Oct. 24, 1932 2 Sheets-Shet 1INVI NTOR. I S BY ATTORNEY N v. 6, 193 s. SCHNEIDE ET AL 1,919,497

LOOK FOR DOOR TRAPS AND THE LIKE Filed Oct. 24, 1932 2 Sheets-Sheet 2 20i ll ATTORNEY Patented Nov. 6, 1934 9 UNITED STATES 1,979,491 I LOOK FORnoon TRAPS AND THE LIKE Simon Schneider and David F. Murphy,

Oakland, Calif.

Application October 24, 1932, Serial No. 639,245 5 Claims. (01. 10-50)This invention is a door trap and is particularly directed to a doorwhich may be locked froma remote point and which, when locked will trapanyone within the door, and is preferably directed to revolving doors tobe used in banks and similar institutions for the purpose of trappingpersons attempting malicious practice.

The main object of the invention is to pro: vide means whereby a personattempting to pass through a revolving door may be entrapped between thewings thereof, the trapping means being controlled from a remote point.

Another object of the invention is to provide means as outlinedcontrolled from a remote point, bothfor locking the door inpredetermined position. 1 and also for releasing the locking means froma remote point. 1

Afurther object of the invention is to provide such locking means whichmay also be used in association with any type of closure such asordinary swinging doors, trap doors, and windows.

Other objects and advantages of the invention will become apparent asthe following description is read on the drawings forming a part i ofthis specification and in which similar reference characters are used todesignate similar parts throughout the several views, of which: Fig; 1is a frontelevation of a revolving door with'the invention appliedthereto.

Fig. 2 is a section taken on line 2-2 of Fig. 1.

Fig. 3 is a sectional view of the locking mechanism with the latch boltin released position.

Fig. 4 is a view similar to Fig. 3 with the latch bolt in lockedposition.

Fig. 5 is a section taken through the sole noids to show the core andsleeve and the connection of the locking mechanism to the core. Fig. 6is a section through a modified form of the locking device.

Fig. 7 is a wiring diagram covering the invention.

The invention may be applied to any type of door or window and may becontrolled from a remote point and may be operated either by alternatingcurrent or by current derived from a battery or any other source ofelectric current.

The invention is indicated in the drawings as applied to a revolvingdoor having four wings 10, 11, 12 and 13 and being pivoted at top andbottom as indicated at 14 and 15, a partial enclosure being formed bywalls 16 and '17 which are preferably made of bullet proof glass. and

extending to enclose the space between two of the wings. I s e i Acircular element 18 is provided witha bolt slot 19 for each wing andispreferably disposed at a point intermediate to the wings, and is adaptedto cooperate with the latch bolt 20, which forms a part of the lockingdevice.

The locking device consists of a solenoid, which in thedrawings is woundfor-alternating current, and'consists of a pair of opposed coils 21and'22 having a common core 23 which is slidably mounted in a sleeve 24and which sleeve is provided with stops 25 to limit the movement of thecore. The pin 26 is secured in the core23 and is adapted forreciprocating movement in theslot 27 formed in the sleeve 24, this slotextending beyond the axis of the latch bolt 20 so as topositively retainthe latch bolt in inoperative or released position. Pin 26forms a pivotfor a link 28 which link is provided at its other end witha slot 29cooperating'with a pin 30 which is secured in the latch bolt 20. Thelatch bolt slidable in a suitable aperture formed in the latch plate 31,and the latch bolt is urged to locking position by a spring 32.

,The solenoid coils 21 and 22 are secured to a housing 33 which housingencloses the operating mechanism "for thelatch bolt.

Themodificationshown in Fig. 6 is similar in operation to thatpreviously set forth except that theends of the solenoid are closed by afixed iron core 34 which is faced at its inner end with soft rubber orother resilient material 35 for the purpose of silencing the impact ofthe core 36 which core is reciprocal within the coils 3'7 and 38, thecoils being, mounted asindicated on a housing 39. The .link 42 isadapted for positive locking and unlocking and with the arrangementshown the latch bolt cannot be retracted except by operation of the core36.

The latch bolt is slidably mounted in guides 43 and is secured to aplunger 44 which plunger is provided with a fixed colla r 45againstwhich spring41 The plunger 44 is provided with a pin 46 on whichconnection 42 is pivotally mounted, the

other end of this connection being pivoted to core 36'at 47, and pin 46being slidable in a slot 48 formed in the cross member 49 which issecured to housing 39 as shown.

The wiring diagram is indicated as connected to an alternating powersupply 50' and 51, one

side of the power supply having an intermediate connection between coils21 and 22 as indicated at 52 and the other side of the power line beingin a direction from top to bottom of slot 27 as viewing Figs. 3 and 4,thus changing the position of link 28 from that shown in Fig. 3 to thatshown in Fig. 4. This permits latch bolt 20 to be urged against themember 18, and asthe door is revolved, on registry of the aperture'19with the latch bolt, the latch bolt enters the aperture and locks thedoor in position, coincidently sounding the alarm 56, thus locking theperson attempting to get through the door within the space between twowings, as indicated between 11 and 12 or between 10 and 13, and thearcuate wall 17.

The switches 53 and Y54 are preferably of the push button type and tounlock the door it is merely necessary to close switch 54 whereby thecircuit is completed from line .51 through wire 5'7, switch 54, wire 61,coil 22 .and out, through wire 59 to line 50, which operation does notinclude the transformer 55 or bell .56 in the circuit. This circuitactuates the solenoid to move the link 28 from the position shown inFig. 4 to the position shown in Fig. 3, withdrawing the latch bolt 20from recess 19, and as the pin 26 goes past the center of the latchbolt, it is retained in unlatched position.

With this invention, it is intendedv that the escape of bandits mayreadily be obviated and the bandit trapped within the revolving doorbetween two wings and the arcuate wall associated therewith, as heattempts to pass through the door. It is merely necessary to close [theswitch 53 or press the button switch connected at this point to releasethe latch, so that as the bandits attempts to pass through the door, thedoor will be locked by the latch when one quarter turn has been made andwhich would look the doors in the position shown in Fig. 2. The banditcould be retained therein until ofiicers appeared on the scene at whichtime the switch 54 would be closed, unlatching the door and permittingthe bandit to be removed therefrom.

Having described an operative method and means for trapping personswithin a revolving door, and remotely controlled locking means forclosures, it will be understood that variations in construction andarrangement of partswhich are consistent with the appended claims may beresorted to without detracting from the spirit or scope of the inventionor sacrificing any of the advantages thereof.

We claim:

1. A remotely controlled lock for closures comprising a solenoid, a corefor said solenoid, a link pivotally connected at one end to said core, alatch bolt slidable transversely of said core, said link being pivotallyand slidably connected at its other end to said latch bolt, said latchbolt being resiliently urged to locking position, and means forpositively actuating said core in either direction.

2. An electrically actuated lock comprising a solenoid provided with acore, a latch bolt slidably mounted in transverse relation to said coreand movable across the core, a link pivotally connected to said core andto said latch bolt at its opposite ends, and having sliding movementrelative to said latch bolt being resiliently urged to locking position.

3. An electrically operated lock comprising two spaced apart solenoidcoils and a common core cooperating therewith, a latch bolt extendingtransversely across the core and slidably mounted relative to said core,a link having one end pivotally connected to said core, the other end ofsaid link having an elongated slot formed therein, a pin secured in saidlatch bolt and engaged said slot. to permit sliding of the link relativeto the latch bolt, said latch bolt being resiliently urged to lockingposition.

4. In an electrically actuated lock, a housing, a sleeve extendingthrough said housing and having end portions projecting from oppositesides thereof, a slot being formed in said sleeve within the housing, asolenoid disposed about each projecting end portion of said sleeve andseamed to the housing, an elongated core for both solenoids slidable insaid sleeve, a pin carried by said core intermediate its length andprojecting through the slot in the sleeve, a latch bolt slidable throughsaid housing transversely across said sleeve with its end portionsprojecting from the housing and one end portion being adapted forengagement with a member to be secured, a spring yieldably holding saidbolt in a normal position, and a link having one end pivoted to the pincarried by said core and its other end pivotallyconnectecl with aportion of the bolt within the housing.

5. In an electrically actuated look, a housing, a sleeve extendingthrough said housing and having end portions projecting from oppositesides thereof, a slot being formed in said sleeve within the housing, asolenoid disposed about each projecting end portion of said sleeve andseamed to the housing, an elongated core for both solenoids slidable insaid sleeve, a pin carried by said core intermediate its length andprojecting through the slot in the sleeve, a latch bolt slidable throughsaid housing transversely across said sleeve, a spring yieldably holdingsaid bolt in a normal position, and a link pivoted to the pin of saidcore and pivotally and slidably connected with said bolt.

SIMON SCHNEIDER. DAVID F. MURPHY.

